Talk:Primary color
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[edit] Psychological Primary Colors
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Please help improve this article or section by expanding it. Further information might be found on the talk page or at requests for expansion. This article has been tagged since January 2007. |
I'm surprised that this article doesn't explain the Psychological Primary Colors. Please put so in whatever article they are appropriate for. They were not invented by any Wikipedian; they are mentioned at http://dictionary.reference.com at "primary color", and at several Internet sites, as you can see by doing a Google search. 66.32.126.20 21:30, 3 Apr 2004 (UTC)
[edit] Old talk
"This is also lends some insight into why visible-light lasers tend to be only red, green, or blue. using combinations of colors creates frequency interference, causing the beam to become decollinated and to spread apart quickly. (But does it explain why lasers aren't orange, yellow, or cyan? Those colors can also be created with one wavelength.)"
There is nothing fundamental about these colors, they're just wavelengths. Color is arbitrarily determined by in the eye, depending on the intensity of the signal in one of the six different types of cone groups. For a quick proof by counterexample, the maser was invented before the laser (maser stands for Microwave Amplification by Stimulated Emission of Radiation, and has no color whatsoever)--BlackGriffen
I also removed:
This is the reason that television uses red, green, and blue phosphors. Any color combination can be represented by mixing different proportions of the primary colors. Note that in practice this is restricted by technical limitations of the medium, for example the television standard NTSC is noted for its inability to represent certain colors to retain backward compatibility with black and white televisions.
This isn't true at all. There's really no such thing a "primary" and "non-primary" color--the primaries are just whichever ones you choose to call primary, and the colors they can make with mixing are only those within the gamut of those your choose. Some make better choices than others, but let's not make it sound like there's some special property of red, green, and blue that make them magical or something. --LDC
What makes red, green, and blue special is that they correspond to the peak responses for the human eye's photoreceptors. Is that right? --Damian Yerrick
Well, yes, there is that. But the primaries typically chosen for TVs and such don't correspond exactly to the peaks of the cones' responses, but to colors that are pretty close and that have cheap available phosphors. And you really can stray pretty far from the actual human visual primaries and still get a good gamut. And non-human eyes may have entirely different primaries--birds have four, for example. --LDC
Red, green and blue are not the peak responses. The wavelengths of the peak responses are given in the color article. You choose red, green and blue light because you get the biggest part of the human color space that way. Red light for instance is lower in frequency than the "red" cone's peak frequency in the eye so that it won't create a response in the "green" cone (the cone's response curves overlap). There is a definite biological reason why red, green and blue light are the additive primaries for human color vision, but it's not the peak responses.AxelBoldt
[edit] Primaries in L*a*b space
On the diagram at color under 'CIE XYZ color space', the colors around the outside of the horseshoe shape (but not the bar that links the two ends) are colours that appear in the rainbow. That is, they can be made of light of a single wavelength. This makes them a bit special, and could be the basis for calling them primary. They cannot be made by mixing any other single-wavelength colors. The colors in the middle (which would include the colors of phosphors used in television) can be made by mixing pure-wavelength light (or colors from the outside of the horseshoe). The colors on the bar that links the two ends of the horseshoe are sometimes called 'imaginary colors', as they don't appear in the rainbow, and there is no single wavelength light of those colors. They must be made by mixing the blue and red wavelengths at either end of the rainbow.
[edit] Ok for the hundredth time
And you are are very cose to correct but listen carefuly, cause it's confusing: Additive color is not a color space. RGB of given colors can be a color space. So you can say a such and such RGB is a color space which uses the additive color system..yadda yadda So you can say a such and such CMYK is a color space which uses the subtractive color system..yadda yadda
So ya almost got it
I'm getting the page entitled Subtractive color space deleted by the admins, 'cause it's just plain wrong. We willl eventually have a lovely page describing the subtractive color system.
Am I making sense?
It's subtle, but crucial--Dkroll2 02:51, Dec 27, 2004 (UTC)
[edit] Color and Color vision is a simple task to describe.
I havent' a clue what ya'll have done to this definition but it's been taken to the far side. Color and Color vision is a simple task to describe. Just do that, I can't believe all the techno mumbo jumbo which belongs somewhere else. I'm saying to delete the visible spectrum or the rods and cones, but red it and imagine you are coming there wanting to know how color works, and maybe link to a section on how to control it/standardize/quantify it. Too much in one place just for a tiny word "color" IMHO Love ya smarties anyway --Dkroll2 06:37, Dec 27, 2004 (UTC)
[edit] Wikiproject Color
I'm looking to start up Wikipedia:WikiProject_Color again. It seems to have been dormant for a while, even though there was a lot of great work and discussion already done. Anyone care to join me? --Laura S 01:31, 19 May 2006 (UTC)
[edit] The term vector basis may be improper
Hello. In the introduction, we have:
- If the color space is considered as a vector space, the primary colors can be regarded as a set of basis vectors for that space.
but I think it is not mathematically correct. If the color space is of dimension 3, then any three linearly independent colors would make a set of basis vectors, even if they are not primary colors. Probably primary colors would be better defined has extreme points of a convex set, or perhaps generative vectors of a convex cone. --Bernard 17:36, 22 September 2006 (UTC)
[edit] Gendale?
I believe this is a newly discovered primary color. Shouldn't it be mentioned somewhere on this page?24.234.170.197 02:15, 5 October 2006 (UTC)
- Gendale is a joke, isn't it? From what I have seen on the web, it seems to be an impossible color --Bernard 19:10, 9 October 2006 (UTC)
[edit] Primary Colour or Colour?
I found the page by typing 'primary colour' and in the first paragraph it said 'A primary colour or colour'. I found the page again by typing 'primary color' and the introductory paragraph said 'A primary color or color'. Why does it say this?--Jcvamp 13:59, 11 December 2006 (UTC)
- Maybe it is some Wikipedian who allowed this to work, but I HAVE NO IDEA HOW THIS IS POSSIBLE. Georgia guy 14:43, 11 December 2006 (UTC)
